/ Dictionary / Index U urolithiasis: Meaning and Definition of Find definitions for: u•ro•li•thi•a•sis Pronunciation: (yoor"ō-li-thī'u-sis), [key] — n. Pathol. a diseased condition marked by the formation of stones in the urinary tract. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. urolith urology Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language